Way to redirect login page if user not login - redirect

Question

I want to redirect user to login page if he is not logged on page. But i have actionLogin in my registrationController
So when I use in my common/main:
'as beforeRequest' => [ //if guest user access site so, redirect to login page.
'class' => 'yii\filters\AccessControl',
'rules' => [
[
'actions' => ['login', 'error'],
'allow' => true,
],
[
'allow' => true,
'roles' => ['#'],
],
],
],
It always redirect me to index.php?r=site%2Flogin
Is it possible to change main login redirect to index.php?r=registration%2Flogin?
If it possible where I should overwrite code or change something..
'user' => [ 'loginUrl' => ['registration/login'], ],
resolve problem but when I want to go to registration/index to signup user it redirect me to registration/login.
Is it possible to rule out this url from being enforced? I Want to make index.php?r=registration the only available path.
And here is my facebook login; I want to enable this too
public function oAuthSuccess($client) {
// get user data from client
$userAttributes = $client->getUserAttributes();
$user = User::find()->where(['Email' => $userAttributes['email']])->one();
if (!$user) {
$newuser = New SignupForm();
$newuser->oAuthSuccess($client);
$user = User::find()->where(['Email' => $userAttributes['email']])->one();
if ($newuser->validate() && Yii::$app->getUser()->login($user)) {
Yii::$app->session->setFlash('success', Yii::t('app', 'Udało się poprawnie zalogować. Prosimy dokonać zmian w ustawianiach profilu.'));
return $this->redirect('index.php?r=content/news');
}
}
Yii::$app->user->login($user);
}

Answer 1

In your app/config/web.php (for basic template) or
app/frontend/config/main.php (for advance template) - reference
return [
// ...
'components' => [
// ...
'user' => [
'identityClass' => 'common\models\UserIdentity',
'enableAutoLogin' => true,
'loginUrl'=>['registration/login']
],
// ...
and in your controller for eg RegistrationController.php
// ...
class RegistrationController extends Controller
{
public function behaviors()
{
return [
'access' => [
'class' => AccessControl::className(),
'rules' => [
[
'actions' => ['login', 'signup'], // those action only which guest (?) user can access
'allow' => true,
'roles' => ['?'],
],
[
'actions' => ['home', 'update'], // those action only which authorized (#) user can access
'allow' => true,
'roles' => ['#'],
],
],
],
'verbs' => [
'class' => VerbFilter::className(),
'actions' => [
'logout' => ['post'],
],
],
];
}
// ...

Answer 2

The simple way is using index.php from backend web or public directory
<?php
// comment out the following two lines when deployed to production
defined('YII_DEBUG') or define('YII_DEBUG', true);
defined('YII_ENV') or define('YII_ENV', 'dev');
require __DIR__ . '/../../vendor/autoload.php';
require __DIR__ . '/../../vendor/yiisoft/yii2/Yii.php';
$config = require __DIR__ . '/../../config/web.php';
$config["controllerNamespace"]='app\controllers\backend';
(new yii\web\Application($config))->run();
if(Yii::$app->user->isGuest){
$request_headers = apache_request_headers();
$srv=$request_headers['Host'];
header("Location: https://".$srv);
die();
}